Reversible chair-seat.



PATENT-ED JUNE 25, 1907.

R- .N. B. PETERSEN. REVERSIBLE CHAIR SEAT.

APPLICATION FILED SEPT. 29, 1906.

2 SHEETS-SHEET 1.

. PATENTED JUNE 25, 1907.

. R. N. B. PETERSEN.

Z-SHEETS-SHEET 2.

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E. s 5Y7 W fin /MM w z mr V is m (wave-x55 rrnrrnn STATES RICHARD N. B. PETERSEN, OF MANKATO, MINNESOTA.

REVERSIBLE CHAIR-SEAT.

Specification of Letters Patent.

Patented June 25, 1907.

Applicatien filed September 29,1906- Serial No. 336,658.

v To all whom it may concern.-

Be it known that I, RICHARD N. B. PETER- SEN, of Mankato, Blue Earth county, Minnesota, have invented certain new and useful Improvements in Reversible Chair-Seats, of which the following is a specification.

My invention relates to reversible chair seats or bottoms.

The object of the invention is to provide a seat capable of being turned or reversed and hence adapted particularly for barbers chairs which through continuous use, particularly in warm weather, become hot and uncomfortable.

A further object is to have the seats or bottoms of chairs in hotels, restaurants and cars or other public places, made reversible or capable of being turned for sanitary reasons.

The invention consists generally in providing a chair or seat having a reversible bottom.

Further, the invention consists in various constructions andcombinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevation partially in section of a barbers chair with my invention applied. thereto. Fig. 2 is a sectional view showing the upper and under sides of the seat and the mechan ism for turning the same. Figs. 3, 4- and 5 are detail, sectional views of the seat turning mechanism.

In the drawing, 2 represents the frame of a barbers chair having the usual supporting standard 3, the foot rest 4 and the back 5.

6 represents the seat frame having upholstering 7 on both sides and trunnions 8 ournaled in the upper ends of bars 9 which move vertically between guide plates 10 and 11 on the chair frame. surfaces 12 to engage corresponding surfaces 13 on the chair frame to prevent the seat from tilting when in its normal position and when occupied. The bars 9 have teeth 14 on one edge meshing with gears 15 carried by a shaft 16 journaled in the chair frame and having an operating lever 17. A gear 18 is mounted on the chair frame and meshes with The seat frame has beveled.

wheel 22 is loosely mounted on the axis of the gear 18 and a chain 23 connects the said sprocket wheel, after passing under idle wheels 24 and 25, with a small sprocket wheel 26 on one of the seat trunnions 8. A series of pins 27 are provided at intervals in the sprocket wheel 22 and in the path of the dog when the gear is moved in one direction.

WVhen the gear is moved in the opposite direction, the dog pressed outwardly at one end will at its opposite end clear the pins and'allow backward movement of the gear without disturbing the sprocket wheel. A limited movement of the gear 18 is permitted preparatory to reversing the seat bottom for the purpose of elevating the seat sufliciently to clear the chair frame. This movement is indicated in the figures wherein Fig. 3 represents the normal position of the parts, the

operating lever being in contact with a stop pin 28.

In Fig. 4 the lever is raised toward an upright position, thus revolving the shaft and the gear 18 and lifting the rack bars and the seat frame supported thereon. During this upward movement the dog contacts with one of the pins in the sprocket wheel, and further movement of the lever will cause the revolution or reversal of the seat frame and its upholstered surfaces. During this turning movement the lever is moved to the position indicated in Fi 5 where a second stop pin 29 is provided for limiting the movement of the lever in that direction. As soon as the seat has been turned the lever is thrown back to its normal position and thegear revolving backward will allow the rack bars to fall and lower the seat without moving the sprockets as the dog 19 held by its springin engagement with the pin 20 will clear the pins 27 during its backward movement.

To conceal the operating parts and protect them from dust and injury, hinged plates 30 may be provided on each side of the chair frame. accommodate themselves to the different positions of the seat.

I have shown this invention applied to a barbers chair but it is equally applicable to seats in railway cars, hotels and restaurants or wherever it may bedesirable for comfort These will swing up and down and.

ism for raising or lowering the said seat and mechanism set in operation by the movement of said raising means and adapted to turn said seat at a certain predetermined elevation, substantially as described.

2. The combination, with a chair frame, of a reversible seat or bottom, vertically movable bars whereon said seat is pivoted, a gear mechanism for raising or lowering said bars and means becoming operative during the upward movement of said seat for turning or reversing it at a certain elevation.

3. The combination, with a chair frame, of bars vertically movable therein and having rack teeth on their edges, a'seat frame journaled on said bars and capable of being turned or reversed thereon, a shaft mounted in said chair frame, and having an operating lever, gears secured on said shaft and engaging said bars, and mechanism normally inoperative and becoming operative during the last part of the upward movement of said bars for reversing or turning said seat, substantially as described.

ssases 4. The combination, with a chair frame, of a reversible seat or bottom, means for raising and lowering the said seat, and mechanism normally inoperative and becoming operative during the last part of the upward movement of said seat for turning or reversing the same, said mechanism comprising a sprocket chain and wheels, and means for locking them to impart a rotary movement to said seat.

5. The combination, with a chair frame, of vertically movable bars, a seat or bottom pivoted on said bars, mechanism comprising a rack and gears for raising said bars and seat, and means becoming operative during the upward movement of said seats for turning or reversing it at a certain elevation, substantially as described.

In Witness whereof, I have hereunto set my hand this 20th day of September, 1906.

RICHARD N. B. PETERSEN.

Witnesses:

C. L. BENEDICT, W. W. SMITH. 

